I've committed some small changes to try to resolve the problem of SQL99-mandated
truncation of precision of time fields for TIMESTAMP and TIME data types.
Per the recent discussion, I've relaxed the mandated behavior for unspecified
precision of time fields for both date/time literals and for schema definitions.
I've also committed some small changes to the ODBC driver to convert CURRENT_TIME()
(note the parens) to an ODBC-specific function per the usual convention for
supporting goofy ODBC functions.
I would *like to* remove the corresponding syntax extensions in gram.y since they
have little to no apparent value. However, the archives are currently broken so I
don't know if there are other reasons for wanting them there.
